Vitamin A Nutrition Quiz

What is the recommended dietary allowance (RDA) of Vitamin A for men?

700 µg RAE/d

Which form of Vitamin A is mainly stored in the liver and adipose tissue?

Retinol

What is the biological activity of β-carotene compared to retinol activity equivalent (RAE)?

~ 12µg = 1µg retinol/RAE

What is the main function of Vitamin A in the body?

Vision Signup and view all the answers

What is the RAE of Vitamin A for lactating females?

950 µg/d Signup and view all the answers

What is the efficiency of retinol absorption compared to carotene?

70-90% Signup and view all the answers

Which food item provides the highest amount of Vitamin A per serving?

Beef liver, pan fried, 3 ounces Signup and view all the answers

What is the primary source of Vitamin A for the body?

Carotenoids Signup and view all the answers

What is the RAE of Vitamin A for males aged 11-14?

600 µg/d Signup and view all the answers

What is the main metabolic function of Vitamin A?

Participates in the conversion of light into nerve impulses Signup and view all the answers

What is the efficiency of carotene absorption compared to retinol?

5-60% Signup and view all the answers

What is the main cause of Vitamin A deficiency?

Poor absorption Signup and view all the answers

Which of the following is a symptom of vitamin A deficiency?

Impaired production of rhodopsin Signup and view all the answers

What is the function of retinoic acid in gene expression?

Regulates the expression of structural proteins Signup and view all the answers

Which of the following is a measure of vitamin A status?

Dark adaptation time Signup and view all the answers

What is a potential consequence of vitamin A toxicity?

Liver and bone damage Signup and view all the answers

Which receptors bind to the retinoic acid response element (RARE) on DNA?

$\alpha,\beta,\gamma$ retinoic acid receptor (RAR) Signup and view all the answers

What is the direct measure of vitamin A status?

Liver biopsy Signup and view all the answers

What is the main function of retinoic acid in epithelial cells?

Cell differentiation Signup and view all the answers

What is the role of carotenoids in the body?

Function as antioxidants Signup and view all the answers

What is the recommended upper limit of dietary intake for vitamin A in pregnant women?

3000-3300 µg Signup and view all the answers

What is the measure used to assess vitamin A status after vitamin A ingestion?

Relative Dose Response test Signup and view all the answers

What is a potential consequence of vitamin A deficiency?

Xerophthalmia Signup and view all the answers

What is the role of vitamin A in embryonic development?

Cell differentiation Signup and view all the answers

What is the main function of retinoic acid in gene expression?

Activates transcription Signup and view all the answers

Which receptors bind to the retinoic acid response element (RARE) on DNA?

$\alpha,\beta,\gamma$ retinoic X receptor (RXR) Signup and view all the answers

What is the measure used to assess vitamin A status after vitamin A ingestion?

Relative Dose Response test Signup and view all the answers

What is the direct measure of vitamin A status?

Liver biopsy Signup and view all the answers

What is a potential consequence of vitamin A toxicity?

Liver and bone damage Signup and view all the answers

What is the main cause of Vitamin A deficiency?

Inadequate dietary intake Signup and view all the answers

What is the role of carotenoids in the body?

Function as antioxidants Signup and view all the answers

What is the main metabolic function of Vitamin A?

Regulates gene expression Signup and view all the answers

What is the main function of Vitamin A in the body?

Vision Signup and view all the answers

What is the primary source of Vitamin A for the body?

Fruits and vegetables Signup and view all the answers

What is the efficiency of retinol absorption compared to carotene?

Higher Signup and view all the answers

What is the efficiency of carotene absorption compared to retinol?

Lower Signup and view all the answers

What is the retinol activity equivalent (RAE) for 1µg of β-carotene?

12µg Signup and view all the answers

What is the primary form of Vitamin A stored in the liver and adipose tissue?

Retinol Signup and view all the answers

What is the recommended dietary allowance (RDA) of Vitamin A for women?

600 µg Signup and view all the answers

What is the main metabolic function of Vitamin A?

Participates in the conversion of light into nerve impulses Signup and view all the answers

What is the measure used to assess vitamin A status after vitamin A ingestion?

Retinol Binding Protein Signup and view all the answers

What is the efficiency of retinol absorption compared to carotene?

70-90% Signup and view all the answers

What is the RAE of Vitamin A for males aged 18-64?

900 µg Signup and view all the answers

What is a potential consequence of vitamin A deficiency?

Night blindness Signup and view all the answers

What is the efficiency of carotene absorption compared to retinol?

Lower Signup and view all the answers

What is the main function of retinoic acid in gene expression?

Regulates the expression of target genes Signup and view all the answers

Which food item provides the highest amount of Vitamin A per serving?

Beef liver, pan fried, 3 ounces Signup and view all the answers

What is the biological activity of β-carotene compared to retinol activity equivalent (RAE)?

Lower Signup and view all the answers

Vitamin A Nutrition Quiz

Questions and Answers

What is the recommended dietary allowance (RDA) of Vitamin A for men?

Which form of Vitamin A is mainly stored in the liver and adipose tissue?

What is the biological activity of β-carotene compared to retinol activity equivalent (RAE)?

What is the main function of Vitamin A in the body?

What is the RAE of Vitamin A for lactating females?

What is the efficiency of retinol absorption compared to carotene?

Which food item provides the highest amount of Vitamin A per serving?

What is the primary source of Vitamin A for the body?

What is the RAE of Vitamin A for males aged 11-14?

What is the main metabolic function of Vitamin A?

What is the efficiency of carotene absorption compared to retinol?

What is the main cause of Vitamin A deficiency?

Which of the following is a symptom of vitamin A deficiency?

What is the function of retinoic acid in gene expression?

Which of the following is a measure of vitamin A status?

What is a potential consequence of vitamin A toxicity?

Which receptors bind to the retinoic acid response element (RARE) on DNA?

What is the direct measure of vitamin A status?

What is the main function of retinoic acid in epithelial cells?

What is the role of carotenoids in the body?

What is the recommended upper limit of dietary intake for vitamin A in pregnant women?

What is the measure used to assess vitamin A status after vitamin A ingestion?

What is a potential consequence of vitamin A deficiency?

What is the role of vitamin A in embryonic development?

What is the main function of retinoic acid in gene expression?

Which receptors bind to the retinoic acid response element (RARE) on DNA?

What is the measure used to assess vitamin A status after vitamin A ingestion?

What is the direct measure of vitamin A status?

What is a potential consequence of vitamin A toxicity?

What is the main cause of Vitamin A deficiency?

What is the role of carotenoids in the body?

What is the main metabolic function of Vitamin A?

What is the main function of Vitamin A in the body?

What is the primary source of Vitamin A for the body?

What is the efficiency of retinol absorption compared to carotene?

What is the efficiency of carotene absorption compared to retinol?

What is the retinol activity equivalent (RAE) for 1µg of β-carotene?

What is the primary form of Vitamin A stored in the liver and adipose tissue?

What is the recommended dietary allowance (RDA) of Vitamin A for women?

What is the main metabolic function of Vitamin A?

What is the measure used to assess vitamin A status after vitamin A ingestion?

What is the efficiency of retinol absorption compared to carotene?

What is the RAE of Vitamin A for males aged 18-64?

What is a potential consequence of vitamin A deficiency?

What is the efficiency of carotene absorption compared to retinol?

What is the main function of retinoic acid in gene expression?

Which food item provides the highest amount of Vitamin A per serving?

What is the biological activity of β-carotene compared to retinol activity equivalent (RAE)?

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